I am new to compact PCI. I just finished doing Signal integrity analysis on one of our backplanes.
I could not see any suggestion for termination resistors in the compact PCI electrical specs.
Usually PCI drivers have internal impedance of roughly 7-10ohms. PCB traces rarely have that kinda impedance.
Is it left to us to add a series termination resistor?
Moreover, there are no specs for Overshoot and Undershoot. Am I missing something?